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Shanghai AI Lab Releases Sage-A1.5: A 35B MoE Agentic Model Advancing Long-Horizon Software and Scientific Discovery

The Shanghai Artificial Intelligence Laboratory published the technical report for Sage-A1.5 on arXiv:2610.28578, introducing an open-weights 35B Mixture-of-Experts (MoE) foundation model purpose-built for agentic tasks. Building on the Agents-A1 lineage, Sage-A1.5 focuses on scaling the agent execution horizon rather than model parameters through adaptive capability composition. Tailored for complex repository-level software engineering and multi-step scientific hypothesis exploration, Sage-A1.5 consistently outperforms dense 70B+ baselines on long-horizon reasoning benchmarks while maintaining lightweight deployment footprints.

Shanghai AI Lab Releases Sage-A1.5: A 35B MoE Agentic Model Advancing Long-Horizon Software and Scientific Discovery

Key Takeaways

  • Shanghai AI Lab published Sage-A1.5 (arXiv:2610.28578), open-sourcing a 35B MoE agentic foundation model
  • Pioneers horizon scaling over raw parameter expansion, sustaining consistent focus across 100+ execution steps
  • Optimized for repository-level software engineering bug fixes, matching dense 70B+ baselines on complex git issue resolution
  • Features intrinsic scientific exploration and hypothesis generation capabilities, tailored for local on-prem cluster deployment
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GitSwarm Unveils Decentralized Compounding Inference: Multi-Agent Collaboration via Git Branching and Atomic Commits

Tackling long-horizon problem solving and scientific discovery requires computation to compound across successive attempts. While humans build upon partial proofs, failed experiments, and prior hypotheses, current test-time compute paradigms (e.g., MCTS and Best-of-N) isolate search trajectories into independent silos, discarding intermediate reasoning artifacts upon branch failure. Researchers introduce compounding inference and its open-source instantiation GitSwarm (arXiv:2610.04862). GitSwarm establishes an asynchronous multi-agent coordination architecture where homogeneous LLM agents collaborate through structured persistent memory hosted in a shared, branchable Git repository. Intermediate artifacts are preserved as atomic commits, while explicit semantic dependencies link cross-branch contributions, enabling agents to inspect, branch, verify, and synthesize past discoveries. Evaluated on rigorous long-horizon benchmarks, GitSwarm paired with GPT-5.5 solves all 30 problems on IMOProofBench-Advanced in a single execution run, and scores 79.4% on ProgramBench compared to 65.1% for the strongest reported baseline under identical budgets.

Key Takeaways

  • Introduces Compounding Inference and GitSwarm, converting transient test-time compute into persistent knowledge assets
  • Employs Git repositories as multi-agent memory, tracking atomic commits, semantic dependencies, and cross-branch merges
  • Solves 100% of IMOProofBench-Advanced problems with GPT-5.5 in a single run and achieves 79.4% on ProgramBench
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Can AI Agents Make Open-Ended Scientific Discovery? Station Multi-Agent Ecosystem Rediscovers 62.7% of ICLR Oral Breakthroughs

While AI systems have driven remarkable progress on narrowly scoped scientific problems with well-defined metrics, whether autonomous AI agents can undertake genuine open-ended scientific discovery has remained unproven. Researchers present Station (arXiv:2610.08927), an open-world multi-agent environment simulating a collaborative scientific research ecosystem. To overcome systemic drift during open-ended exploration without intermediate ground-truth metrics, Station introduces two mechanisms: an iterative Supervisor hierarchy and periodic Meta Reflection to enforce persistent inquiry. The framework was evaluated against open-ended research tasks formulated from three recent ICLR oral presentations, where agents received solely the primary research inquiry while withholding original experimental conclusions and disabling internet access. Station autonomously rediscovers an average of 62.7% of the original scientific criteria, compared to just 15.4% for Codex Multiagent-v2 and 14.4% to 20.6% for AI Scientist-v2. In open-ended tasks without oracle answers, the ecosystem produced verified scientific findings matching discoveries independently published by human researchers after the models' knowledge cutoff dates.

Key Takeaways

  • Station simulates collaborative scientific ecosystems, demonstrating autonomous open-ended discovery without external search
  • Rediscovers 62.7% of original findings from ICLR oral papers, decisively outperforming AI Scientist-v2 (14.4%-20.6%)
  • Introduces supervisory steering and periodic meta-reflection, successfully forecasting empirical discoveries published after model training cutoffs
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GPT-6 Astra Now Available to Pro, Enterprise, and API Users

GPT-6 Astra is now live for all Pro, Enterprise, and Business Premium users in ChatGPT Work and Codex, and in the API. OpenAI calls it the world's most intelligent and aligned model, with new state-of-the-art results on computer use, software engineering, and scientific discovery.

Key Takeaways

  • Live now in ChatGPT Work, Codex, and the API; Plus rollout follows in days
  • Sets new SOTA on computer-use, software engineering, and science benchmarks
  • Positioned as OpenAI's most aligned model with stronger intent understanding
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OpenAI: GPT-6 Astra SOTA on FrontierMath, ARC-AGI 3, and TerminalBench-4.0

OpenAI says GPT-6 Astra is state-of-the-art on FrontierMath Tier 4, ARC-AGI 3, and TerminalBench-4.0, and also leads on Terminal-Bench Science 0.1 and HealthBench Pro—highlighting agentic terminal and scientific discovery strength.

Key Takeaways

  • Claims SOTA on FrontierMath Tier 4, ARC-AGI 3, and TerminalBench-4.0.
  • Science side: also claims lead on Terminal-Bench Science 0.1 and HealthBench Pro.
  • Companion to the launch post, framing coding/terminal-agent and research workflows.
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